package ooday03;

/** 测试类 */
public class Test {
    public static void main(String[] args) {
        Dog dog = new Dog("小黑",2,"黑");
        System.out.println(dog.name);
        dog = null; //表示空，没有指向任何对象
        System.out.println(dog.name);

        //- 区别1：给引用类型数组的元素赋值时，需要new个对象
        //- 区别2：访问引用类型数组的元素的属性/行为时，需要打点访问
        Dog[] dogs = new Dog[3];
        dogs[0] = new Dog("小黑",2,"黑");
        dogs[1] = new Dog("小白",1,"白");
        dogs[2] = new Dog("小灰",3,"灰");
        System.out.println(dogs[0].name); //输出第1只狗狗的名字
        dogs[1].age = 4; //修改第2个狗狗的年龄为4岁
        dogs[2].swim(); //第3只狗狗在游泳
        for(int i=0;i<dogs.length;i++){ //遍历dogs数组
            System.out.println(dogs[i].name); //输出每只狗狗的名字
            dogs[i].eat(); //每只狗狗吃饭
        }

        Chick[] chicks = new Chick[2];
        chicks[0] = new Chick("小花",1,"花");
        chicks[1] = new Chick("大花",3,"白");
        for(int i=0;i<chicks.length;i++){ //遍历chickes数组
            System.out.println(chicks[i].name);
            chicks[i].eat();
        }

        Fish[] fish = new Fish[4];
        fish[0] = new Fish("小金",2,"金");
        fish[1] = new Fish("大金",4,"白");
        fish[2] = new Fish("小绿",1,"绿");
        fish[3] = new Fish("大绿",3,"白");
        for(int i=0;i<fish.length;i++){ //遍历fish数组
            System.out.println(fish[i].name);
            fish[i].eat();
        }

    }
}




















